Double-a extension haystacker



J. H. CQPE v DOUBLE-A EXTENSIO Jan. 1 0,4928.

N HAYSTACKER Filed Sept. 26. 1921 3 Sheets-Sheet 1 ,4 TTORNE Y Jan. 10, 1928.

J. H. COPE DOUBLE-A EXTENSION HAYSTACKER Filed Sept. 26. 1921 3 Sheets-Sheet 2 KN NM 5 W Jam 10, 1928.

- J. H. COPE DOUBLE-A EXTENSION HAYSTACKER Fi 1 e d Sept. 26. 1921 7 3 Sheets-Sheet 5 I ATTORNEY or m Patented Jan; 10, 1923.

' UNITED srarss an FFEQEZQ JOSEPH H. COPE, OF DENVER, COLORADO.

DOUBLE-A EXTENSIQN HAYSTACKERI Application filed September 26, 1921. Serial No. 503,420.

nation of a litting arm, an extension armand link or other extending means, with a double-A frame for lifting the lifting arm. The double-A frame is composed ot two A-trames which are pivoted to the stationary frame work of the stacker, one oi these A-' frames being normally disposed nearer the vertical thanthe other and extending" thereabove, the upper ends of the two frames being connected by a. link and the dral't cable being connected with higher frame end, whereby much of the strain heretofore placed by the cable on the frame-connected with the lifting arm is avoided by reason of the upward pull of the connecting link on said frame. The invention also comprisesan adjustable, cushion stop-mechanism :tor cush ioning the shock 01 the stop when the load thrown and for stopping the movement cf the stacker head at any desired position to throw the load. Means are also provided for withdrawing the cable from either side of the stacker at an intermediate-point there'- ot instead of at the rear, and a pulley construction is employed at the rear of the stacker for receiving the cable and for preventing dislodgement thereof. bar is employed which runs along the ground longitudinally of the stacker and extenlils from the rear thereof so that the stack may be built upon the projecting end and thereby stabilize the stacker during use.

In the drawings which form a part of this specilicatitm and wherein certain eni bodiinents of the invention are disclosed:

Fig. 1 is a side elevation of the stacker;

Fig. 2 is an elevational detail of the cushion stop;

Fig. 3 is a perspective view of the stop block;

Fig. l is an elevationaldetail of the pulley construction Fig. 5 is a detail showing the cable connect-ion with the upper end of the higher A-traine;

Fig. 6 is a detail of the cable-withdrawing device; 1 t

7 is an elevational detail ofa modified form of stop An anchor Fig. 8 is a plan of the stacker of Figs. 1 to 6;

Fig. 9 is an elevational detail of the cushion of Fig. 2 and is taken from line 99' 01% Fig. 8;

Fig. lO is a longitudinal vertical section taken on line 1010 of Fig. 8;. n

Fig. 11 is a detail of a further form of cushion stop arrangement 5 and Fig. 12 is a perspective detail of the mounting of the lower end oi the higher itframe.

The stacker is composed of the usual longh tudinal ground timbers 12 which are con-- nected by means of a'plurality of cross bars i-ii, l5, l6 ans'l 17. carries an upstanding block 18 straddling the cross bar 15. and each block 18 has a pair oi ears 1-!) secured thereto between which the ends of braces 20 and 21 are secured, the upper extrei'nit-ies of said cars carrying; pivots 22 for the lifting arrns23 and; the short arms 24 which carry the back-stops 25, the latter being engageable by, the extension links 251. The extension arms 26 which carry the stacker head H are slidable upon the lilting: arms 13, their position being deteiniined by means of guiding clips 27 secured thereto and engaging the arms 23. The extension arms 26 are provided with holes 28 for receivingpositioning pins for adjustably positioning the torwardends oi two-part extension links the forward part 30 of. each link being pivotally connected with the rear part 31. and the latter cxtend ing between the pair oi? bars forming the respectire short stop arm 24, the back stops 25 being also carried between said pairs of bars. Braces aresecured to intermediate portions of the rear link parts 31 and extend downward and inward as seen in Fig. 3, both the braces 82 and the link parts being pivoted upon a transverse rod whose ends are mounted in upstanding brackets secured to the ti nbcrs 12. A. stud36 is provided on each rear link part 31 to maintain the stop armsQd in elevated position, and a pin 37 is mounted in the upper end, of each part 31 for engagement by the part 30 to preventdoubling back thereof. When the part 30 is connected with the extension ar1n26 at the point shown so to give the maximum extension, a removable pin 38 is passed through the stop arms 24- to engage the forward side of link part 31 andinsure return of the arm 26 to nor- Each side timber 12 mal position on arm 23 when head H is lowered.

A centrally positioned, longitudinally disposed block or beam 39 is mounted upon the sills or cross bars 14 and 15 and carries at its rear end side links l0 between which a longitudinally extending anchor bar or rail 42 is removably pivoted, this rail extending forward between the ground timbers 12 to a point somewhat forward of the cross bar 16. The forward end of the rail 42 is provided with a socket 453 to receive a stake etafor anchoring the end of the rail on the ground, and chains or the like 45 having a little slack are connected with the socket a3 and the cross bar 16 whereby a limited amount of upthrow of the stacker frame will be permitted when the stacker head reaches the load-throwing position, thus taking some of the shock from the stacker frame. Also the rail 42 takes the strain from the rear sill 14. when the load is being lifted by cable C.

In combination with the extension parts a double-A lifting frame is used. This is composed of a lower A-frame 46 and a higher A-frame 55, frame 46 preferably being provided with a brace 47 just forward of frame 55, and frame 55 being provided with braces 155. The higher frame 55 is narrower than the lower frame and extends therethrough. The lower frame 46 has its lower and rear ends pivoted at 4:8 to the frame braces 21 directly above the cross bar 16, while its upper and forward end is pivotally connected at 49 with lifting rods 50 and a lifting link The rods 50 are pivotally connected at 51 to the lifting arms 23 and guiding clips 52 secured to the arms 23 by the ends of rods 50, through which clips the extension arms 26 slide. The lifting link 53 has its upper end provided with a bifurcated connector 153 receiving a pivot pin for the upper end of the A-fraine 55 and for the pulley 56 and yoke 57 which carry the cable 6. The lower ends of the firframe 55 are pivoted on a transverse rod 58 whose ends are secured upon blocks 59, both the rod and the blocks being conveniently secured to the cross bar 17 by means of Ubl0ts 60.

One end of the cable C is connected to the yoke 57, the cable passing therefrom to the rear of the stacker framework where it passes around a movable pulley 61 whence it returns to the head of the A-frame and passes around pulley 56, the cable again leading to the rear of the stacker and passin g around a pulley 62 somewhat larger than pulley 61. The pulleys 61 and 62 are iounted between a pair of plates which compose a frame 63, and this frame is pivoted in a bifurcation in the rear of beam 39 (Fig. 8) as by means of a bolt 64 which also supports the links 40 for the anchor rail 42.. To insure against displacement of the cable from the pulleys 61 and 62, the tips of the frame plates 63 are extended in opposite directions longitudinally of the axis of said frame and are provided with bolts 65 which carry sleeves 66 (Fig. 4t) for retaining the cable C on the pulleys. These sleeves per form the additional function of spacing the plates 63. From the pulley 62, cable C leads forward beneath the beam 39 to the forward end thereof where it passes through rotatable casing 67 and around a pu' ey (38 contained therein. The cable leaves the casing 67 laterally and extends toward and through the side of the stacker frame, being preferably withdrawn through the upstanding block 18 a hown which forms a convenient guide. The casing G7 is pro cided at one end. with a journal 69 mounted in an angle plate 70 secured at 71 to the block 39, and at the other end with a journal 72 bearing in a plate 73 positioned on cross bar 15. By means of journals 69 and 72, the casing (5'? may be rotated so that the cable C may be directed toward either side of the stacker as it leaves said casing and thereby be made to extend from either side of the stacker for withdrawal. therefrom, as may be desired.

A sprin pull-back is employed for the purpose or insuring return of the stacker head when carried beyond dead center as indicated in dotted line position in F 1. This pull-back comprises a spring 7% secu 'ed to each lifting arm 23, the forward end of each spring being connected to the respective end of a transverse slide-bar '75 adapted to travel in slots '76 in said lifting arms A block 7'? depends from the under side of the forward end of each link part 30 for engagement with the slide-bar 75 to tension the spings [an adjustable stop block 78 is provided on each arm 23 for e ageinent with the forward edge of the bar '55 when the limit of extension is reached whereby the sudden stoppii g f movement will cause the load to be thrown from the stacker head H.

The stop blocks Te are stepped at thci for ward ends indicated at I?) for eng nient relatively sta with the rear edge of a sides of the hf cross bar on the under ting arms 23 which bar is indicate 1 at St). Each block 78 is provided with a threaded pin or screw which is adapted to lie in the adjacent groove 76 and to be set in position by means of a clamp nut 82. In this manner the blocks 78 may be set in any adjusted position so as to throw the load when desired, an one of the steps 79 being set in engagement with bar 80 as selected and thus causing contactof the bar 75 with blocks 78 earlier or later. Either the depending blocks 77 or the adjustable stop-blocks i8 are provided with cushioning mechanism. This is shown on blocks 77 in 1, 2 and 9, and on stopblocks 78 in Fig. 10. The cushion COH1- prises an engaging plate 83 having a stem 8% lim i-neasea extending into a guide passage 85 in the block, a transverse pin 86 working in a. slot 186 in the block and being secured in the stem 84 so as to limit outward n'iovement of plate 83. I1 cushion spring 87 is provided between the plate 83 and the block and direetly cushions the shock of the stopping of movement. The tensioned pull-back springs 7e insure return of the parts over dead center. V

In l ig. 11 a modified form of adjustable cushion stop is shown for use on any type of extension stacker. This comprises blocks 88 adj ustably mounted on extension arms 26 by means of pins 89 and a plurality of holes 90 for receiving said pins. The blocks 88 carry the plates 83 and springs 87, adjustable stop blocks 91 being provided on the lifting arms by means of pins 92 and. holes 98.

In Fig. 7 a. further modified form of adjustable cushion stop is shown. Here the stacker is provided with ground timbers 112 and upright postsat the rear thereof as in dicated at 94, these posts being braced by braces 95. A pivoted back stop having a transverse stop bar 9'? used in this form as indicated at 96, and is adapted to be engaged by lifting arms or the like of the stacker when the load is to be thrmvn. For cushioning the shock when the load thrown, platcsl83 for engagement by the back stop 96 are provided, these plates being carried on stems 15% carrying springs 187 and passing through the posts 9%, the posithe stacker and underlie the stack, whereby the stack itself and the stake d lretain the rail and anchor the stacker. .Vhen the cable C is withdrawn from either side of the stacker as by a team, the A-frame 55 through the medium of link 53 causes fivframe 46 to lift the arms 23 and 26 and the head H through the medium of rods 50. When the link parts Bl engage the back stops 25 the link parts 30 cause the arms 26 and head'II to be extended. hen the blocks 77 engage slidebar 75 the springs 74: are tensioned until bar 75 strikes steps 78 and the load is thrown. The sudden stop for producing the throw is however cushioned by the springs 87.

lhe tensioned springs 74 now return the head over dead center whereupon the weight of the parts causes descent to continue. When the maximum extension is required, as indicated by the ar 'angement in Fig. 1, the pins 38 are required to insure complete return of the arms 26 along arms 23 at the different extension starts immediately upon comend of the descent, whereas when less OX. tension isrequired gravity causes complete return of the parts before the forward end of the arms falls below the horizontal posi tion of the pivots 22. Since l t-frame 55 nearly vertical before commencement of op erations and a direct upward pull through link 53 is produced on A-frame 46, there little strain on frame 46 in a rearward direction and operation is more etlicient.

The swinging pulley frame (53 permits the pulleys 61 and $2 to adjust themselves according to the position of the pulley 56, and interference of the strands of the cable with each other is avoided by reason of the pulley (ll being smaller than the pulley Adjustment for variation of extension is readily accomplished by changingpins 29 to holes 28. In the position shown mencement of elevation of the stacker head H.

When the stack is completed the chains 4-5 and links 40 are disconnected and the stacker moved to another location. The stake 4:4- is then drawn and the anchor rail &2 moved.

I claim:

1. In a haystacker, a lifting arm, an e tension arm, a head on the extension arm, a member movable with the extension arm, a tensionable pullback member to be engaged and tensioned by the first named member. and a stop member to stop the movement of the other of said members and of the extension arm, one of said members having cushioning means to cushion the stoppage in movement.

2. In a haystacker, a lifting arm carrying a head, a lifting frame connected with said arm, a ground frame, a pair of pulleys mov able'relatively to each other and carried on said ground frame, a cable carried over said pulleys and connected with said lifting frame, and means adjacent the pulleys for retaining the cable on the pulleys.

3. In a haystacker, a. ground frame, a liftingarm carryii'ig a head, a lifting frame connected with said arm, a pulley frame mounted on said ground frame and mov: ble on a pivot, a pair of pulleys carried by said pulley frame, a cable connected with said lifting frame and carried over said pulleys, and means on the pulley frame adjacent each pulley for retaining the cable on the pulleys.

4. In a haystacker, a ground frame,- an anchor rail connected with said frame and extending rearward from the rear thereof, and means for detachably connecting the rail tothe frame. I

5. In a haystacker, a ground frame, an anchor rail disposed longitudinally of the frame and extending from the rear of the frame, and means connecting said rail to the frame and permitting a limited amount ill) of movement between the rail and the frame.

6. In a haystacker, a main frame, and an anchor rail disposed longitudinally of the frame and connected therewith and extend ing from the rear thereof.

7. In a haystaclrer, a main frame, and an anchor rail extending from the 1 r end thereof, whereby stack built on the extending end of the rail anchors said extend 111;; end, the forward end of said rail being flexibly connected with the main frame.

8. ln haystaclier, a main frame and an anchor rail, the rear end of the rail extend ing from the rear of said frame. and the front end of the rail having a eonnectioi'i with the frame permitting a limited amount of movement of the frame with respeet to the rail.

10. In a haystacker, a frame having a cross bar and a rail connected with the frame extending from the frame below said cross bar and beyond the frame to al chor the frame.

11. In a haystacker a frame an anchor rail, means to anchor said rail to the ground, and a connection between the rail and the forward portion of the stacker t'rame permitting movement of the frame relatively to the rail.

12. In a haystaclcer a frame, an anchor rail pivotally connected to the frame, and means for anchoring the rail to the ground at its forward end, its rear end extending from the rear of the frame to be anchored by a stack.

13. In a haystacker a frame an anchor rail disposed longitudinally of said frame adapted to be anchored to the ground and connected with the rear end of the frame.

1%. In a haysfaclnn', a frame having a cross bar, an anchor rail ad: pied to be anchored to the ground and eaten ling from the rear of the frame beneath said cross bar, and a connection between the rail and the rear of the fsame.

if. lo a haystacker, a ground frame, a il'ting frame thereon, a pulley frame on ie ground frame, a pair of pulleys in said ulley frame, a cable connected with said fti" frame and unning over said pulleys end offset extensions on said pulley frame adjacent said pulleys provided with cable retaining means.

In testimony whereof, I affix my signature.

JOSEPH l-l. COPE. 

